[...]

 15900K .......... .......... .......... .......... .......... 95% 39.9M 0s
 15950K .......... .......... .......... .......... .......... 95% 78.3M 0s
 16000K .......... .......... .......... .......... .......... 96%  212M 0s
 16050K .......... .......... .......... .......... .......... 96% 78.3M 0s
 16100K .......... .......... .......... .......... .......... 96% 95.1M 0s
 16150K .......... .......... .......... .......... .......... 96% 86.9M 0s
 16200K .......... .......... .......... .......... .......... 97% 2.80M 0s
 16250K .......... .......... .......... .......... .......... 97% 74.1M 0s
 16300K .......... .......... .......... .......... .......... 97% 2.29M 0s
 16350K .......... .......... .......... .......... .......... 98% 80.4M 0s
 16400K .......... .......... .......... .......... .......... 98% 67.3M 0s
 16450K .......... .......... .......... .......... .......... 98% 74.1M 0s
 16500K .......... .......... .......... .......... .......... 99% 13.4M 0s
 16550K .......... .......... .......... .......... .......... 99%  287M 0s
 16600K .......... .......... .......... .......... .......... 99%  327M 0s
 16650K .......... .......... .......... .......... .......... 99%  380M 0s
 16700K .......                                               100%  156M=1.7s
2019-06-03 11:28:56 (9.53 MB/s) - 'Python-3.7.3.tar.xz' saved [17108364/17108364]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/python3-3.7.3-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 99a90a7 - up to 3.7.3
fatal: HEAD does not point to a branch
Building python3.spec with the following conditional flags:
 --without tests
from available:
--with   :	 info verbose_tests
--without:	 optimizations system_mpdecimal <tests> tkinter
Writing git revision for tag auto/ti/python3-3.7.3-1
On detached HEAD. Use -r BRANCHNAME to override
error: Macro %_builddir has empty body
error: Macro %_builddir has empty body
Executing(--clean): env -i TMP=/home/users/builder/tmp HOME=/home/users/builder PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin TMPDIR=/home/users/builder/tmp  /bin/sh -e /home/users/builder/tmp/rpm-tmp.58917
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf Python-3.7.3
Begin-TLD-Builder-Info
Build-Time: user:1.58s sys:0.36s real:13.30s (faults io:211 non-io:226156)
Files queued for ftp:
  17148773 python3-3.7.3-1.src.rpm
       185 python3-3.7.3-1.src.rpm.uploadinfo
End-TLD-Builder-Info